process-util: use our usual tristate semantics for is_main_thread()

While at it, _unlikely_ is dropped, as requested in https://github.com/systemd/systemd/pull/35242#discussion_r1880096233
2024-12-11 14:44:07 +01:00
parent e18768751e
commit 07612aab66
1 changed files with 4 additions and 4 deletions
@@ -1226,12 +1226,12 @@ int pid_from_same_root_fs(pid_t pid) {
 }

 bool is_main_thread(void) {
-        static thread_local int cached = 0;
+        static thread_local int cached = -1;

-        if (_unlikely_(cached == 0))
-                cached = getpid_cached() == gettid() ? 1 : -1;
+        if (cached < 0)
+                cached = getpid_cached() == gettid();

-        return cached > 0;
+        return cached;
 }

 bool oom_score_adjust_is_valid(int oa) {